Ernst Haeckel

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See Ernst Haeckel in Wikipedia, the free encyclopedia.

Ernst Heinrich Philipp August Haeckel was a German biologist and philosopher. Haeckel is well known for his experimental work on embryology and developmental biology. His most significant contribution can be summarised by the statement "ontogeny recapitulates phylogeny". This theory basically posits that the entire evolutionary history of an organism can be seen in its developmental sequence as an embryo. He published the first detailed evolutionary tree in 1866 in his General Morphology of Organisms. Haeckel organized all creatures, including man, into families, genera, and species on the basis of progressive skeletonization.

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